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Lukáš Dufka

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Posts posted by Lukáš Dufka

  1. Hi, I have a question. Electric current in the circuit according to the relation I=1-10cos(50t). Determine the time when the Q=0 C.

    I used:

     

    I =dQ/dt 

    Q(t) = ∫ Idt 

    = ∫(1-10cos(50t))dt 

    = t - (10/50)sin(50t) + C 

    = t - 0.2sin(50t) + C

     

    But what now ? I donť known how can i calculate the time... Someone told me that i must find the interval of definite integral... from t=0 to t=?....

     

    Thank you for reply. 

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